//app.js
App({
  globalData: {
    userInfo: null,
    datailExtData: "暂无收录相关信息"
  },
  getUserInfo: function (cb) {
    var that = this;
    if (this.globalData.userInfo) {
      typeof cb === "function" && cb(this.globalData.userInfo)
    } else {
      //调用登录借口
      wx.login({
        success: function () {
          wx.getUserInfo({
            success: function (res) {
              that.globalData.userInfo = res.userInfo
              typeof cb === "function" && cb(that.globalData.userIfo)
            }
          })
        }
      })
    }
  }
})